Alternating current conductivity and electrical conductivity relaxation in an intercalated polymer electrolyte

Jeevanandam, P and Vasudevana, S (1998) Alternating current conductivity and electrical conductivity relaxation in an intercalated polymer electrolyte. In: Journal of Chemical Physics, 109 (18). pp. 8102-8108.

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Abstract

Sodium cations solvated by polyethylene oxide have been confined by intercalation in the interlamellar space of an insulating layered solid, CdPS3. The frequency-dependent conductivity and the associated conductivity relaxation in the intercalated polymer electrolyte have beenb investigated. The temperature-dependent conductivity displays a distinct change in behavior at T similar to 225 K. Below 225 K the dc conductivity, sigma(dc), shows an Arrhenius temperature dependence, while for T > 225 K sigma(dc) rises sharply and follows the Vogel-Tamann Fulcher relation, characteristic of ionic motion coupled to polymer relaxation modes. An analysis of the frequency dependent conductivity using the electrical modulus representation showed that the electrical conductivity relaxation may be described in terms of the stretched exponential correlation function in the time domain, phi(t) = exp(-t/tau(sigma))(beta). The absence of any anionic contribution to the electrical response makes these intercalated polymer electrolyte systems attractive for fundamental studies on ionic motion in disordered polymeric media.

Item Type:	Journal Article
Publication:	Journal of Chemical Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	20 Feb 2009 09:04
Last Modified:	19 Sep 2010 04:59
URI:	http://eprints.iisc.ac.in/id/eprint/17941

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